The blessings of Maa Baglamukhi produce a divine protective shield in the shape of the aura all over someone therefore defending him/her from malefic energies in the form of black magic spells or evil eye. Yet another interpretation indicates that Baglamukhi can be a corruption with the term Valgamukhi; https://www.youtube.com/watch?v=IOlRdolK0uM&t=2s